java去除字符串空格
package test;
/**
* 去除字符串空格
*
* @author xusucheng
* @create 2018-07-04
**/
public class RemoveWhitespace {
public static void main(String[] args) {
String s = "He ll o, Wor ld !";
//1.正则表达式方式:"\s"匹配任何不可见字符,包括空格,制表符,换页符等
System.out.println(s.replaceAll("\\s+",""));
//2.自定义方法
System.out.println(trimAllWhitespace(s));
}
public static String trimAllWhitespace(String str) {
if (str.length()==0) {
return str;
}
StringBuilder sb = new StringBuilder(str);
int index = 0;
while (sb.length() > index) {
if (Character.isWhitespace(sb.charAt(index))) {
sb.deleteCharAt(index);
}
else {
index++;
}
}
return sb.toString();
}
}
输出:
Hello,World!
Hello,World!